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gimp/app/tools/gimpsheartool.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "core/gimp-transform-utils.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimpspinscale.h"
#include "display/gimpdisplay.h"
#include "display/gimptoolgui.h"
#include "display/gimptoolsheargrid.h"
#include "gimpsheartool.h"
#include "gimptoolcontrol.h"
#include "gimptransformgridoptions.h"
#include "gimp-intl.h"
/* index into trans_info array */
enum
{
ORIENTATION,
SHEAR_X,
SHEAR_Y
};
#define SB_WIDTH 10
/* local function prototypes */
static gboolean gimp_shear_tool_info_to_matrix (GimpTransformGridTool *tg_tool,
GimpMatrix3 *transform);
static gchar * gimp_shear_tool_get_undo_desc (GimpTransformGridTool *tg_tool);
static void gimp_shear_tool_dialog (GimpTransformGridTool *tg_tool);
static void gimp_shear_tool_dialog_update (GimpTransformGridTool *tg_tool);
static void gimp_shear_tool_prepare (GimpTransformGridTool *tg_tool);
static GimpToolWidget * gimp_shear_tool_get_widget (GimpTransformGridTool *tg_tool);
static void gimp_shear_tool_update_widget (GimpTransformGridTool *tg_tool);
static void gimp_shear_tool_widget_changed (GimpTransformGridTool *tg_tool);
static void shear_x_mag_changed (GtkAdjustment *adj,
GimpTransformGridTool *tg_tool);
static void shear_y_mag_changed (GtkAdjustment *adj,
GimpTransformGridTool *tg_tool);
G_DEFINE_TYPE (GimpShearTool, gimp_shear_tool, GIMP_TYPE_TRANSFORM_GRID_TOOL)
#define parent_class gimp_shear_tool_parent_class
void
gimp_shear_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_SHEAR_TOOL,
GIMP_TYPE_TRANSFORM_GRID_OPTIONS,
gimp_transform_grid_options_gui,
0,
"gimp-shear-tool",
_("Shear"),
_("Shear Tool: Shear the layer, selection or path"),
N_("S_hear"), "<shift>H",
NULL, GIMP_HELP_TOOL_SHEAR,
GIMP_ICON_TOOL_SHEAR,
data);
}
static void
gimp_shear_tool_class_init (GimpShearToolClass *klass)
{
GimpTransformToolClass *tr_class = GIMP_TRANSFORM_TOOL_CLASS (klass);
GimpTransformGridToolClass *tg_class = GIMP_TRANSFORM_GRID_TOOL_CLASS (klass);
tg_class->info_to_matrix = gimp_shear_tool_info_to_matrix;
tg_class->get_undo_desc = gimp_shear_tool_get_undo_desc;
tg_class->dialog = gimp_shear_tool_dialog;
tg_class->dialog_update = gimp_shear_tool_dialog_update;
tg_class->prepare = gimp_shear_tool_prepare;
tg_class->get_widget = gimp_shear_tool_get_widget;
tg_class->update_widget = gimp_shear_tool_update_widget;
tg_class->widget_changed = gimp_shear_tool_widget_changed;
tr_class->progress_text = C_("undo-type", "Shear");
tr_class->progress_text = _("Shearing");
tg_class->ok_button_label = _("_Shear");
}
static void
gimp_shear_tool_init (GimpShearTool *shear_tool)
{
GimpTool *tool = GIMP_TOOL (shear_tool);
gimp_tool_control_set_tool_cursor (tool->control, GIMP_TOOL_CURSOR_SHEAR);
}
static gboolean
gimp_shear_tool_info_to_matrix (GimpTransformGridTool *tg_tool,
GimpMatrix3 *transform)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
gdouble amount;
if (tg_tool->trans_info[SHEAR_X] == 0.0 &&
tg_tool->trans_info[SHEAR_Y] == 0.0)
{
tg_tool->trans_info[ORIENTATION] = GIMP_ORIENTATION_UNKNOWN;
}
if (tg_tool->trans_info[ORIENTATION] == GIMP_ORIENTATION_HORIZONTAL)
amount = tg_tool->trans_info[SHEAR_X];
else
amount = tg_tool->trans_info[SHEAR_Y];
gimp_matrix3_identity (transform);
gimp_transform_matrix_shear (transform,
tr_tool->x1,
tr_tool->y1,
tr_tool->x2 - tr_tool->x1,
tr_tool->y2 - tr_tool->y1,
tg_tool->trans_info[ORIENTATION],
amount);
return TRUE;
}
static gchar *
gimp_shear_tool_get_undo_desc (GimpTransformGridTool *tg_tool)
{
gdouble x = tg_tool->trans_info[SHEAR_X];
gdouble y = tg_tool->trans_info[SHEAR_Y];
switch ((gint) tg_tool->trans_info[ORIENTATION])
{
case GIMP_ORIENTATION_HORIZONTAL:
return g_strdup_printf (C_("undo-type", "Shear horizontally by %-3.3g"),
x);
case GIMP_ORIENTATION_VERTICAL:
return g_strdup_printf (C_("undo-type", "Shear vertically by %-3.3g"),
y);
default:
/* e.g. user entered numbers but no notification callback */
return g_strdup_printf (C_("undo-type", "Shear horizontally by %-3.3g, vertically by %-3.3g"),
x, y);
}
}
static void
gimp_shear_tool_dialog (GimpTransformGridTool *tg_tool)
{
GimpShearTool *shear = GIMP_SHEAR_TOOL (tg_tool);
GtkWidget *vbox;
GtkWidget *scale;
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
gtk_box_pack_start (GTK_BOX (gimp_tool_gui_get_vbox (tg_tool->gui)), vbox,
FALSE, FALSE, 0);
gtk_widget_show (vbox);
shear->x_adj = gtk_adjustment_new (0, -65536, 65536, 1, 10, 0);
scale = gimp_spin_scale_new (shear->x_adj, _("Shear magnitude _X"), 0);
gimp_spin_scale_set_scale_limits (GIMP_SPIN_SCALE (scale), -1000, 1000);
gtk_box_pack_start (GTK_BOX (vbox), scale, FALSE, FALSE, 0);
gtk_widget_show (scale);
g_signal_connect (shear->x_adj, "value-changed",
G_CALLBACK (shear_x_mag_changed),
tg_tool);
shear->y_adj = gtk_adjustment_new (0, -65536, 65536, 1, 10, 0);
scale = gimp_spin_scale_new (shear->y_adj, _("Shear magnitude _Y"), 0);
gimp_spin_scale_set_scale_limits (GIMP_SPIN_SCALE (scale), -1000, 1000);
gtk_box_pack_start (GTK_BOX (vbox), scale, FALSE, FALSE, 0);
gtk_widget_show (scale);
g_signal_connect (shear->y_adj, "value-changed",
G_CALLBACK (shear_y_mag_changed),
tg_tool);
}
static void
gimp_shear_tool_dialog_update (GimpTransformGridTool *tg_tool)
{
GimpShearTool *shear = GIMP_SHEAR_TOOL (tg_tool);
gtk_adjustment_set_value (shear->x_adj, tg_tool->trans_info[SHEAR_X]);
gtk_adjustment_set_value (shear->y_adj, tg_tool->trans_info[SHEAR_Y]);
}
static void
gimp_shear_tool_prepare (GimpTransformGridTool *tg_tool)
{
tg_tool->trans_info[ORIENTATION] = GIMP_ORIENTATION_UNKNOWN;
tg_tool->trans_info[SHEAR_X] = 0.0;
tg_tool->trans_info[SHEAR_Y] = 0.0;
}
static GimpToolWidget *
gimp_shear_tool_get_widget (GimpTransformGridTool *tg_tool)
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
GimpDisplayShell *shell = gimp_display_get_shell (tool->display);
GimpToolWidget *widget;
widget = gimp_tool_shear_grid_new (shell,
tr_tool->x1,
tr_tool->y1,
tr_tool->x2,
tr_tool->y2,
tg_tool->trans_info[ORIENTATION],
tg_tool->trans_info[SHEAR_X],
tg_tool->trans_info[SHEAR_Y]);
g_object_set (widget,
"inside-function", GIMP_TRANSFORM_FUNCTION_SHEAR,
"outside-function", GIMP_TRANSFORM_FUNCTION_SHEAR,
"frompivot-shear", TRUE,
NULL);
return widget;
}
static void
gimp_shear_tool_update_widget (GimpTransformGridTool *tg_tool)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
GIMP_TRANSFORM_GRID_TOOL_CLASS (parent_class)->update_widget (tg_tool);
g_object_set (tg_tool->widget,
"x1", (gdouble) tr_tool->x1,
"y1", (gdouble) tr_tool->y1,
"x2", (gdouble) tr_tool->x2,
"y2", (gdouble) tr_tool->y2,
"orientation", (gint) tg_tool->trans_info[ORIENTATION],
"shear-x", tg_tool->trans_info[SHEAR_X],
"shear-y", tg_tool->trans_info[SHEAR_Y],
NULL);
}
static void
gimp_shear_tool_widget_changed (GimpTransformGridTool *tg_tool)
{
GimpOrientationType orientation;
g_object_get (tg_tool->widget,
"orientation", &orientation,
"shear-x", &tg_tool->trans_info[SHEAR_X],
"shear-y", &tg_tool->trans_info[SHEAR_Y],
NULL);
tg_tool->trans_info[ORIENTATION] = orientation;
GIMP_TRANSFORM_GRID_TOOL_CLASS (parent_class)->widget_changed (tg_tool);
}
static void
shear_x_mag_changed (GtkAdjustment *adj,
GimpTransformGridTool *tg_tool)
{
gdouble value = gtk_adjustment_get_value (adj);
if (value != tg_tool->trans_info[SHEAR_X])
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
tg_tool->trans_info[ORIENTATION] = GIMP_ORIENTATION_HORIZONTAL;
tg_tool->trans_info[SHEAR_X] = value;
tg_tool->trans_info[SHEAR_Y] = 0.0; /* can only shear in one axis */
gimp_transform_grid_tool_push_internal_undo (tg_tool);
gimp_transform_tool_recalc_matrix (tr_tool, tool->display);
}
}
static void
shear_y_mag_changed (GtkAdjustment *adj,
GimpTransformGridTool *tg_tool)
{
gdouble value = gtk_adjustment_get_value (adj);
if (value != tg_tool->trans_info[SHEAR_Y])
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
tg_tool->trans_info[ORIENTATION] = GIMP_ORIENTATION_VERTICAL;
tg_tool->trans_info[SHEAR_Y] = value;
tg_tool->trans_info[SHEAR_X] = 0.0; /* can only shear in one axis */
gimp_transform_grid_tool_push_internal_undo (tg_tool);
gimp_transform_tool_recalc_matrix (tr_tool, tool->display);
}
}
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